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ASTM B541 Gold vs. ISO-WD32260 Magnesium

ASTM B541 gold belongs to the otherwise unclassified metals classification, while ISO-WD32260 magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM B541 gold and the bottom bar is ISO-WD32260 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 6.0 to 14
4.5 to 6.0
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 38
18
Shear Strength, MPa 410 to 690
190 to 200
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
330 to 340
Tensile Strength: Yield (Proof), MPa 480 to 900
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 90
330
Melting Completion (Liquidus), °C 1110
600
Melting Onset (Solidus), °C 930
520
Specific Heat Capacity, J/kg-K 170
970
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
28
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
140

Otherwise Unclassified Properties

Density, g/cm3 17
1.9

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
14 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
560 to 700
Stiffness to Weight: Axial, points 3.4
13
Stiffness to Weight: Bending, points 9.0
63
Strength to Weight: Axial, points 11 to 19
48 to 51
Strength to Weight: Bending, points 9.8 to 14
56 to 58
Thermal Shock Resistance, points 36 to 63
19 to 20

Alloy Composition

Copper (Cu), % 13.5 to 15.5
0
Gold (Au), % 70.5 to 72.5
0
Magnesium (Mg), % 0
92.7 to 94.8
Platinum (Pt), % 8.0 to 9.0
0
Silver (Ag), % 4.0 to 5.0
0
Zinc (Zn), % 0.7 to 1.3
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3